Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is_______________?
Correct answer: C. Platinum-platinum + rhodium
- A. Chromel-alumel
- B. Iron-constantan
- C. Platinum-platinum + rhodium
- D. Either A., B. or C.
Explanation
A platinum-platinum-rhodium Type S thermocouple produces approximately 5.5 mV at 600°C. Chromel-alumel and iron-constantan generate much larger emf values at the same temperature.
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